Portable valve-grinding machine.



0. A. OLSON. PORTABLE VALVE GRINDING MACHINE. APPLICATION FILED JUNE 24, 1911.

1,035,996. Patented Aug.20,1 912.

INVEN TOR BY v .i n

A TTORNE Y OSCAR A. OLSON, OF LINCOLN, NEBRASKA.

PORTABLE VALVE-GRINDING MACHINE.

Specification of Letters Patent.

Patented Aug. 20, 1912.

Application filed June 24, 1911. Serial No. 635,204.

To. all whom it may concern:

Be it known that I. OSCAR A. OLSON, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Portable Valve-Grinding Machines, of which the following is a specification.

My invention relates to machines used ordinarily in garages or automobile factor1es 'and repalr shops, and has particular reference to means employed in the manufacture and repair of automobiles and machines of similar construction.

The object of the invention is the constructior; of a machine of general. utility in the work suggested and one which comblnes. in use a valve seating machine, a drill press, an emery wheel and an air pump.

The invention consists in the new and original means employed for accomplishing results and in the general arrangement and combination of parts, and their operation, as will be described and pointed out in the claims. I i

I have illustrated my invention in the accompanying drawing in which Figure 1 is a view in side elevation. Fig. 2 is an end elevation, the upper part of the frame being in cross-section and some of, the

details being omitted.

In the drawing A is the platform of the machine mounted on trucks B.

V is an upright frame mounted on. the

of the machine.

J is a horizontal arm secured to the .upper end of the frame at right angles thereto and braced to the frame by the brace K. Near the outer end of the arin is secured a downwardly extending hollow lug a in which is adjustably secured the upwardly extending arm A formed integrally with the table I), the arm being secured in the lug by a screw bolt B.

At one end of the platform a motor X is supported and operates ta shaft 0 to which are secured pulleys d, e and f. From the pulley (Z a belt U extends to a similar pulley T secured to a shaft- 9 which revolves in suitable bearings in the end of a horizontal arm R extending from near the middle of the supporting frame. An emery wheel S is secured to the shaft and is operated by the motor in the manner described. The pulley f is connected by a belt 2 with a pulley h platform and supports the operating parts mounted at the base of the frame and operates an air pump Y by means of the piston 11 attached to a crank arm j on the pulley h. The belt 2 is omitted in Fig} 2. A belt is connects the pulley e with the large wheel or- I sheave W journaled on a shaft Z operating in a bearing V near the bottom of the frame. Between the sheave W and the bearing a small sheave 0 is secured to the shaft and is connected by a belt m to a sheave P secured to the outer end of a crank shaft Q. which is pivoted in bearings in the frame above the arm B. At the opposite end of the shaft Z a plain wheel W is secured and the cable ends H and H of the cable H are pivotally secured to opposite sides of the respective wheels by means of the spring connections 15 and 16. The cable passes over the pulleys L and L secured to'the shaft 3 mounted 1n bearings at the top of the frame. The cable )asses around the flat groove pulley E which is adjustably secured to the shaft D by means of a screw bolt, F which passes through an enlarged part E of thepulley. 1 The shaft D is operated by the action of the cable on the pulley and is housed in bearings in the head 1 secured to the outer end of the arm J. The cable beingsecured to op osite sides of the wheels V and W, an the wheels turning in one direction by the action of motor and belt, the shaft D is given a reversed motion, being turned first in one direction and then in another, a motion necessary in the true andsuccessful grinding of valves. To. the lower end of the shaft D is secured a chuck c in which the operating tool 0 is adjusted;

When the machine is used for valve grinding the valves with their seats are placed on the table b adjusted underneath. The valves when being ground are raised intermittently from their seats by the means now described. A crank arm N is pivoted at its lower end to the shaft Q'and at the upper end is secured to a Walking beam M, which is centrally pivoted to the pin 2 secured in the arm J. Avertical bolt p is secured to the outer end of the walking beam and a horizontal plate .issecured at one end to the upper end of the bolt by means of nuts .9; The opposite end of the plate is forked and revolubly secured to the pulley E. As the shaft Q is turned by the pulley P and belt m the walking beam is given an oscilla'tin motion and the shaft D raised by the boi p and plate G. It is quite as necessary in the successful grinding of valves that the valve be raised from its seat intermittently as that the tool operating the same beigiven a reversed motion. 4

Means are provided in connection with the manlpulating tool for raislng the valve from its seat as the tool is raised, or causing.

the valve to follow the tool. Such means consist of' a magnetic battery 0" connected to a 'coil G around the tool 0 by wires 0 and G The electric current being transmitted to the .-tool magnetizes it and causes the valve to adhere theretoasthe tool is raised by the action of the walking beam.

When the machine is used for a drill press the cable H and the belt m, are removed and a f belt adjusted to the pulley d passing around the pulley E and over the pulleys 7 and 8, which are free to revolve on the shaft 3 and idle when the drill is not-in use.

tion' necessary in drilling. The drill is held down upon the work by a lever .4 pivoted at one end to the lug a. A sleeve 8 is adjustably secured to the shaft D above the chuck 0- by a screw bolt tand isfreely inclosed by a fork u to which is secured the lower end of-a rod 5, the upper end being pivoted to the lever 4. By loosening the screw bolt the tool may be pressed down by the lever and is. freed from operation when the. lever is releasedby the spring 6 which connects the rod and the lever.

The attachment of the cable ends to the wheels W and W? by means of the springs relieves the strain on the cable and the jar given by the'reverse motionr The vertical mot-ion given theoperating tool by the Copies ofthispatent may be obtained for The operatingtool is thus glvena continuous mowalki-n .beam and the reversed motion of mittently raising them, and means for changing the operation of the tool and shaft to a continuous motion, and for holding the tool down upon the work, substantially as described.

2. The combination of a motor, wheels driven thereby and a supporting frame, a vertical shaft pivotally supported in the frame, a tool operated by the shaft,a walking beam operated by the motor, means connecting the walking beam with the shaft whereby the shaftand tool are intermittently raised, and means for changing the operation of the shaft and tool to a continuous motion and for holding the tool down upon the work, substantially as described.

' In testimony whereof 'I have hereunto signed my name in the presence of two subscribing witnesses.

' QSCAR A. OLSON; Witnesses: v i I JOSEPH ROBERTS,

' JOHN G. BURKET.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

